This application will help you understand the mathematics and statistics behind Risk dice throws. You can use it to calculate general probabilities or simulate specific battle situations. The simulator will use 10.000 fights (roughly 50.000 dice rolls) to determine the outcome. More info.

Battle

Parameters

Enter the number of armies, for attacker and defender.
The simulation will always throw the maximum amount of dice available.
Defender can have comma separated multiple terrirories (e.g. 10 vs. 6,4,2).
Leave blank for generic results.